Re: 0x102a70?

[PA <petite.abeille@...>]

On Jan 31, 2005, at 05:27, Javier Guerra wrote:

> > The key equality is based on the table content. How?
>
> not easy, in fact.  you need __index and __newindex metamethods, of 
> course.
> and lose the constructor syntax.  (because values have to be added 
> after
> attaching the metatable)

Here is my feeble attempt so far:

        -- instance method to compare a given object with this map for 
equality
        this.equals = function( anObject )
                if this == anObject then
                        return true
                end

                if this.isKindOf( anObject ) == true then
                        if this.size() == anObject.size() then
                                for aKey, aValue in ivars do
                                        local anotherValue = 
anObject.get( aKey )

                                        if anotherValue ~= nil then
                                                if this.isKindOf( 
anotherValue ) == true and aValue.equals( anotherValue ) == false then
                                                        return false
                                                end

                                                if aValue ~= 
anotherValue then
                                                        return false
                                                end
                                        else
                                                return false
                                        end
                                end

                                return true
                        end
                end

                return false
        end


Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/